I use this approach in conjunction with server-side sieve, that sorts messages into individual folders. if envelope :detail :matches "to" "*" { set :lower :u

I use this approach in conjunction with server-side sieve, that sorts messages into individual folders. if envelope :detail :matches "to" "*" { set :lower :upperfirst "name" "${1}"; fileinto :create "INBOX.${name}"; stop; }